package com.ma.gulimall.seckill.scheduled;

import com.ma.gulimall.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

/**
 * @ClassName SeckillSkuScheduled
 * @Author: mayongqiang
 * @DATE 2021/11/17 23:32
 * @Description: 秒杀商品的定时上架任务
 */
/*
    秒杀商品的定时上架
        每天晚上三点上架最近三天需要秒杀的商品
        当天00:00:00 - 23:59:59
        明天00:00:00 - 23:59:59
        后天00:00:00 - 23:59:59

 */
@Slf4j
@Service
public class SeckillSkuScheduled {

    @Autowired
    SeckillService seckillService;

    @Autowired
    private RedissonClient redissonClient;

    //秒杀商品上架功能的锁
    private final String upload_lock = "seckill:upload:lock";


    // TODO: 2021/11/20  幂等处理
    @Scheduled(cron = "0 * * * * ?")
    public void uploadSeckillSkuLatest3Days() {
        //1、重复上架无需处理
        log.info("上架秒杀的商品信息");
        //分布式锁。锁的业务执行完成，状态更新已完成。释放锁以后，其他人获取到就会拿到最新的状态。
        RLock lock = redissonClient.getLock(upload_lock);
        try {
            //加锁
            lock.lock(10, TimeUnit.SECONDS);
            seckillService.uploadSeckillSkuLatest3Days();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }
    }

}
